Switch.



A. V. A. MGHARG- SWITCH. APPLICATION FILED APR. 8, 1912.

Emma Aug. 20, 1912 Mlweooieo:

t7 in I a ARTHUR v. A. MQHARG, or New YORK, N. Y.

SWITCH.

to a 'tvhom 2'25 may) concern: "Be it known that I, ARTHUR V. A. MC-

HARG, a citizen ofthe United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Switches, of which the following is a specification.

Theinvention is a switch, especially designed for glow-lamp sockets, and has for its object to simplify and cheapen the construction.

The device com rises a leaf spring in loop form interposed etween the circuit terminals, the free end of which spring is controlled to open or close ,circuit by means of a simple sliding rod or push button.

In the accompanying drawings-Figure 1 is a longitudinal section of a lamp socket containing my device and showing the switch open. Fig. 2 is a similar section showing the switch closed. Fig. 3 is a hori- 16 entering the socket is attached, said conzontalsection on the line on, ac of- Fig. 1. Fig. 4: is a perspective view of the internal plug, showing one circuit terminal. Fig. 5 is an elevation of said plug, showing the other circuit terminal and with a part broken away to show one of the securing bolts for the threaded shell.- Fig. 6 shows the switch, and Fig. 7 the bracket supporting the same, separately and in perspective.

Similar numbers of reference indicate like parts.

My device is disposed in a plug, Fig. 4, which is inserted in the usual metallic shell. 1 of a glow-lamp socket, a lining 2 of insulating material being interposed. Said plug comprises a body portion 3 ofporcelain, suitably cut out to receive a metal bracket fl; secured in place by screw 5. Within the bracket is placed the switch 6, Fig. 6, which consists of; a fiat metal plate 7, having arms 8, 9 in substantially S form, having on their upper side, notches or concavities 10. The

plate 7 bears againstthe under side of bracket 4 and is also secured in place byv screw In the arms of bracket 4 are circulan openings ll'which receive the operat-, ing 'rod 12, from the opposite sides of which extend pins 13. I I p .1

()n'one arm of bracket '4 is a projection 14, Fig. 7, provided with a clamping screw 15." To this projection'the circuit conductor duc'tor being led tothe screw 15 through a notch 17, Fig. 4, made'in the plug. The

Specification of Letters Patent. Patented Aug, 20, 1912.

Application filed April 8,

1912. Serial No. 889,104.

other circuit conductor 18 is secured to a plate 19 fastened on one side of the plug, and extending down. through the end of the usual threaded metallic shell 20 which re ceives the shank of the glow lamp. The

plate 19 is insulated from the shell 20 by an interposed layer 21 ofmica, or the like,

switch 6. Under normal conditions, the pins lie in the loops 23 of switch 6, as shown in F 1g. 1, the ends of the spring arms then not;v making contact with the threaded shell and extends into said shell so as to form a 20.. When it is desired to close circuit to the lamp, the left hand end of rod 12 is moved to the right of the drawing, until the pins 13 enter the notches 10, meanwhile having forced the ends of the arms 8, 9 downwardly until they rest upon and establish electrical connection with the threaded shell, Fig. 2. The resiliency of the arms holds the pins 13 in the notches. When it is desired to extinguish thelamp, the right hand end of rod 12 is pushed to the left of the drawing, thus removing the pins 13 from the notches 1O and restoring the parts to the position shown in Fig. 1.

I claim: 1. A switch, comprising a supporhrseparated circuit terminals thereon, a leaf spring in loop form connected to. one of said terminals, and a rod slidable in said support at right angles to a line joining said terminals,and engaging with-said spring to move the free part thereof .into contact with the other of said terminals.

2. A switch, comprising a support, separated circuit terminals thereon, a leaf spring in loop forn connected to one of said right angles to a line joining said terminals, and a pin on said rod entering the loop of said spring and engaging with the free part thereof to move the same -into contact with the bthe of said terminals.

-39A switch, comprising a support, separated circuit terminals thereon,;a leaf spring in loop form connected to one of said ter- "minals and having a notch in its free part,

terminals, a rod slidable in said support at a rod slidable in said support at right angles to a line. joining said terminals, a pin on said rod entering the loop of said spring and engaging in said notch, and operating to move said free partinto contact With the other of said. terminals. 1

4. A glow-lamp switch, comprising an 1nsulating base, a two-armed bracket of con- 5. A glow-lamp switch, comprising an insulating base, a two-armed bracket of conducting material secured thereto having openings in its arms, a two-armed leaf spring in loop form secured to said bracket, an operating rod disposed between said spring arms and slidable inthe openings in saidvbracket arms, pins on said rod entering the loops of said spring arms, and a contact on said base in proximity to said springs 6. A glow-lamp switch, comprising an insulating base, a 'two-armed bracket of conducting material secured thereto ha ving openings "in its arms, a two armed leaf springin loop form and having a notch in each arm near its'free'end secured [to said bracket, arod slidable in, the openings in said bracket arlns pins-oii said rod entering the loops of said spring arms and engaging in said notches, and acontact supportedon said base proximityto said free ends of s'aid spring arms.

In testimony whereof I have affixed my signature in presence of two Witnesses.

ARTHUR V. A. MoI-IARG.

WVitnesses i .Gnarnnnn T. Pou'rnn,

MAYT. MOGARRY. 

